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  • 11
    Online Resource
    Online Resource
    Re‐evaluation of batoid pectoral morphology reveals novel patterns of diversity among major lineages
    Wiley ; 2016
    In:  Journal of Morphology Vol. 277, No. 4 ( 2016-04), p. 482-493
    Details
    In: Journal of Morphology, Wiley, Vol. 277, No. 4 ( 2016-04), p. 482-493
    Abstract: Batoids (Chondrichthyes: Batoidea) are a diverse group of cartilaginous fishes which comprise a monophyletic sister lineage to all neoselachians or modern sharks. All species in this group possess anteroposteriorly expanded‐pectoral fins, giving them a unique disc‐like body form. Reliance on pectoral fins for propulsion ranges from minimal (sawfish) to almost complete dependence (skates and rays). A recent study on the diversity of planform pectoral fin shape in batoids compared overall patterns of morphological variation within the group. However, inconsistent pectoral homology prevented the study from accurately representing relationships within and among major batoid taxa. With previous work in mind, we undertook an independent investigation of pectoral form in batoids and evaluated the implications of shape diversity on locomotion and lifestyle, particularly in the skates (Rajoidei) and rays (Myliobatoidei). We used geometric morphometrics with sliding semilandmarks to analyze pectoral fin outlines and also calculate fin aspect ratios (AR), a functional trait linked to locomotion. In agreement with previous work, our results indicated that much of the evolution of batoid pectoral shape has occurred along a morphological axis that is closely related to AR. For species where kinematic data were available, both shape and AR were associated with swimming mode. This work further revealed novel patterns of shape variation among batoids, including strong bimodality of shape in rays, an intermediate location of skate species in the morphospace between benthic/demersal and pelagic rays, and approximately parallel shape trajectories in the benthic/demersal rays and skates. Finally, manipulation of landmarks verified the need for a consistent and accurate definition of homology for the outcome and efficacy of analyses of pectoral form and function in batoids. J. Morphol. 277:482–493, 2016. © 2016 Wiley Periodicals, Inc.
    Type of Medium: Online Resource
    ISSN: 0362-2525 , 1097-4687
    URL: Issue
    URL: Article
    DOI: 10.1002/jmor.v277.4
    DOI: 10.1002/jmor.20513
    Language: English
    Publisher: Wiley
    Publication Date: 2016
    detail.hit.zdb_id: 1479991-1
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  • 12
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    A New Paradigm in Alewife Migration: Oscillations between Spawning Grounds and Estuarine Habitats
    Wiley ; 2019
    In:  Transactions of the American Fisheries Society Vol. 148, No. 3 ( 2019-05), p. 605-619
    Details
    In: Transactions of the American Fisheries Society, Wiley, Vol. 148, No. 3 ( 2019-05), p. 605-619
    Abstract: The current paradigm in Alewife Alosa pseudoharengus migrations is shifting from a single reproductive event and rapid movement in and out of freshwater to one that recognizes more nuanced movements and asynchronous batch spawning. In this study, Alewives ( n  =   72) were acoustically tagged in the Carmans River, Long Island, New York, a small coastal river with restored fish passage. Our objective was to examine fine‐scale spatial movements in the tidal and reconnected habitats to identify spawning behavior patterns, including habitat use and spawning periodicity, that can be applied to fishway restoration and species management. Alewives that completed their spawning migration ( n  = 27) exhibited variability in posttagging trajectories, residency, passage rate, and behavior. The current paradigm consisting of a single upstream migration followed by a downstream migration was only seen in 26% ( n = 7) of fish, while 41% ( n = 11) deviated from the paradigm and made multiple reversals and numerous movements on and off the spawning grounds. Oscillations spanned from the estuary into the reconnected habitat and resulted in a proportionally large amount of time spent in the estuarine and brackish habitats. Some oscillations also consisted of multiple fishway passage events within a season. Oscillation behavior is likely a naturally occurring spawning strategy that has gone undetected. Consequently, the proportion of individuals of a population that display single versus multiple passage events could result in fishway counts that bias run size estimations and thus population assessments.
    Type of Medium: Online Resource
    ISSN: 0002-8487 , 1548-8659
    URL: Issue
    URL: Article
    DOI: 10.1002/tafs.2019.148.issue-3
    DOI: 10.1002/tafs.10155
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 2192460-0
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    SSG: 21,3
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  • 13
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    Migration diversity, spawning behavior, and habitat utilization of winter flounder
    Canadian Science Publishing ; 2019
    In:  Canadian Journal of Fisheries and Aquatic Sciences Vol. 76, No. 9 ( 2019-09), p. 1503-1514
    Details
    In: Canadian Journal of Fisheries and Aquatic Sciences, Canadian Science Publishing, Vol. 76, No. 9 ( 2019-09), p. 1503-1514
    Abstract: Winter flounder (Pseudopleuronectes americanus) have declined to less than 11% of their historical abundance in offshore areas and have experienced severe declines and inbreeding in coastal subpopulations. Understanding metapopulation structure and disparate migratory behavior is vital to understanding the species’ dynamics. We used acoustic telemetry to evaluate migratory types, homing behavior, and spawning behavior in adult winter flounder (n = 72) in Mattituck Creek, New York. Telemetry results showed that 17% of the tagged individuals displayed resident behavior and remained in the creek year-round despite mean summer temperatures reaching 28 °C. Alternatively, the migratory group (∼83%) started to leave the system when the mean water temperature reached 12 °C. A dominant driver of migration was not indicated; instead, migration out of or into the creek appeared complex and related to date, temperature, lunar cycle, photoperiod, and year. Approximate spawning was estimated to occur as early as November and continued through April based on aggregative behaviors of adults and back-calculations of dates using young-of-the-year otoliths. Our results support the emerging view that winter flounder’s dynamics reflect local life history and population diversity, which are currently unaccounted for in management.
    Type of Medium: Online Resource
    ISSN: 0706-652X , 1205-7533
    URL: Article
    DOI: 10.1139/cjfas-2018-0053
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2019
    detail.hit.zdb_id: 7966-2
    detail.hit.zdb_id: 1473089-3
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  • 14
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    Application of generalized additive models to examine ontogenetic and seasonal distributions of spiny dogfish ( Squalus acanthias ) in the Northeast (US) shelf large marine ecosystem
    Canadian Science Publishing ; 2014
    In:  Canadian Journal of Fisheries and Aquatic Sciences Vol. 71, No. 6 ( 2014-06), p. 847-877
    Details
    In: Canadian Journal of Fisheries and Aquatic Sciences, Canadian Science Publishing, Vol. 71, No. 6 ( 2014-06), p. 847-877
    Abstract: Increased commercial importance of spiny dogfish (Squalus acanthias) combined with an often debated, and controversial, ecological impact has warranted an investigation of the relationship among distribution, environment, and prey to better understand the species ecology and inform management. To elucidate mechanisms behind distributional changes, we modeled seasonal occurrence and abundance of neonate, immature, and mature spiny dogfish as functions of abiotic and biotic factors using generalized additive models and Northeast Fisheries Science Center bottom trawl survey data. Significant nonlinear relationships were widespread throughout dogfish stages and seasons. Seasonal occurrence was tightly linked to depth and bottom temperature, with year and Julian day influential for some stages. While these factors also influenced abundance, ecological factors (e.g., squid abundances) significantly contributed to trends for many stages. Potential impacts of climate change were evaluated by forecasting distributions under different temperature scenarios, which revealed higher regional probabilities of occurrence for most stages during a warmer than average year. Our results can be used to better understand the relationship between sampling periods and movement drivers to survey catchability of the population in the Northeast (US) shelf large marine ecosystem.
    Type of Medium: Online Resource
    ISSN: 0706-652X , 1205-7533
    URL: Article
    DOI: 10.1139/cjfas-2013-0342
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2014
    detail.hit.zdb_id: 7966-2
    detail.hit.zdb_id: 1473089-3
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  • 15
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    Influence of environmental, spatial, and ontogenetic variables on habitat selection and management of spiny dogfish in the Northeast (US) shelf large marine ecosystem
    Canadian Science Publishing ; 2014
    In:  Canadian Journal of Fisheries and Aquatic Sciences Vol. 71, No. 4 ( 2014-04), p. 567-580
    Details
    In: Canadian Journal of Fisheries and Aquatic Sciences, Canadian Science Publishing, Vol. 71, No. 4 ( 2014-04), p. 567-580
    Abstract: Declines in abundance of commercially valuable groundfish have highlighted the ecological and commercial importance of previously underutilized elasmobranchs in the Northeast (US) shelf large marine ecosystem (NES LME). Seasonal distributions and ontogenetic habitats of one such species, spiny dogfish (Squalus acanthias), were investigated using Northeast Fisheries Science Center (NEFSC) bottom trawl survey data (1963–2009). Neonate, immature, and mature dogfish all selected warmer, more saline, and more southerly locations during spring compared with available locations. During autumn, larger dogfish occupied relatively warmer, shallower, and less saline waters while neonates selected higher salinities. There were strong ontogenetic patterns in habitats occupied. Contrary to expectation, geographic range contracted as abundance increased during autumn. This suggests that niche constraints override density-dependent effects, although detection of relationships within stages was limited by low statistical power. The proportion of mature female survey catch within the Mid-Atlantic Bight was significantly related to temperature, suggesting that environmental conditions surveyed may impact population trends. Collectively, these results highlight critical habitats, suggest mechanisms behind ontogenetic habitat selection, and provide insight into how changing environmental conditions may impact stock assessment.
    Type of Medium: Online Resource
    ISSN: 0706-652X , 1205-7533
    URL: Article
    DOI: 10.1139/cjfas-2013-0259
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2014
    detail.hit.zdb_id: 7966-2
    detail.hit.zdb_id: 1473089-3
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  • 16
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    Table_4.xlsx
    Frontiers Media SA ; 2021
    In:  Frontiers in Marine Science Vol. 7 ( 2021-1-27)
    Details
    In: Frontiers in Marine Science, Frontiers Media SA, Vol. 7 ( 2021-1-27)
    Abstract: Marine protected areas (MPAs) have emerged as potentially important conservation tools for the conservation of biodiversity and mitigation of climate impacts. Among MPAs, a large percentage has been created with the implicit goal of protecting shark populations, including 17 shark sanctuaries which fully protect sharks throughout their jurisdiction. The Commonwealth of the Bahamas represents a long-term MPA for sharks, following the banning of commercial longlining in 1993 and subsequent designation as a shark sanctuary in 2011. Little is known, however, about the long-term behavior and space use of sharks within this protected area, particularly among reef-associated sharks for which the sanctuary presumably offers the most benefit. We used acoustic telemetry to advance our understanding of the ecology of such sharks, namely Caribbean reef sharks ( Carcharhinus perezi ) and tiger sharks ( Galeocerdo cuvier ), over two discrete islands (New Providence and Great Exuma) varying in human activity level, over 2 years. We evaluated which factors influenced the likelihood of detection of individuals, analyzed patterns of movement and occurrence, and identified variability in habitat selection among species and regions, using a dataset of 23 Caribbean reef sharks and 15 tiger sharks which were passively monitored in two arrays with a combined total of 13 acoustic receivers. Caribbean reef sharks had lower detection probabilities than tiger sharks, and exhibited relatively low habitat connectivity and high residency, while tiger sharks demonstrated wider roaming behavior across much greater space. Tiger sharks were associated with shallow seagrass habitats where available, but frequently transited between and connected different habitat types. Our data support the notion that large MPAs afford greater degrees of protection for highly resident species such as Caribbean reef sharks, yet still may provide substantial benefits for more migratory species such as tiger sharks. We discuss these findings within the context of species-habitat linkages, ecosystem services, and the establishment of future MPAs.
    Type of Medium: Online Resource
    ISSN: 2296-7745
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    DOI: 10.3389/fmars.2020.608848
    DOI: 10.3389/fmars.2020.608848.s001
    DOI: 10.3389/fmars.2020.608848.s002
    DOI: 10.3389/fmars.2020.608848.s003
    DOI: 10.3389/fmars.2020.608848.s004
    DOI: 10.3389/fmars.2020.608848.s005
    DOI: 10.3389/fmars.2020.608848.s006
    DOI: 10.3389/fmars.2020.608848.s007
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2021
    detail.hit.zdb_id: 2757748-X
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  • 17
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    Skating on thin ice: Identifying the need for species‐specific data and defined migration ecology of Rajidae spp.
    Wiley ; 2019
    In:  Fish and Fisheries Vol. 20, No. 2 ( 2019-03), p. 286-302
    Details
    In: Fish and Fisheries, Wiley, Vol. 20, No. 2 ( 2019-03), p. 286-302
    Abstract: Skates (class Chondrichthyes; subclass Elasmobranchii; order Rajiformes; family Rajidae) comprise one quarter of extant chondrichthyans, yet have received little attention in the scientific literature likely due to their relatively low economic value and difficulties in species identification. The absence of species‐specific information on catch, life history and migration of skates has often precluded the development of single‐species stock assessments and led to the use of cursory multispecies assessments, which lack the ability to track species‐specific catch and abundance trends. This has resulted in undetected local extirpations, as has been previously reported for common ( Dipturus batis , Rajidae), white ( Rostroraja alba , Rajidae) and long‐nose ( Dipturus oxyrhinchus , Rajidae) skates in the Irish Sea. Here, we (a) use case studies to illustrate how the perception of skate population structure and stock status has historically been masked through multispecies assessment and management practices, (b) review current information on the movement of skates and identify gaps in knowledge, and (c) identify biases associated with the use of various tagging technologies, which have confounded our understanding of movement and migration ecology of skates. Considering that over 40% of extant Rajidae species are listed as “Data Deficient” by the International Union for Conservation of Nature, we illustrate a critical need to broaden the current understanding of skate life history, movement and migration ecology by providing recommendations on the further application of electronic tags and biogeochemical natural tags in movement studies and highlight the benefits that studies using these approaches have for novel management frameworks.
    Type of Medium: Online Resource
    ISSN: 1467-2960 , 1467-2979
    URL: Issue
    URL: Article
    DOI: 10.1111/faf.2019.20.issue-2
    DOI: 10.1111/faf.12340
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 2024569-5
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  • 18
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    Severe Inbreeding and Small Effective Number of Breeders in a Formerly Abundant Marine Fish
    Public Library of Science (PLoS) ; 2013
    In:  PLoS ONE Vol. 8, No. 6 ( 2013-6-7), p. e66126-
    Details
    In: PLoS ONE, Public Library of Science (PLoS), Vol. 8, No. 6 ( 2013-6-7), p. e66126-
    Type of Medium: Online Resource
    ISSN: 1932-6203
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    URL: Article
    DOI: 10.1371/journal.pone.0066126
    DOI: 10.1371/journal.pone.0066126.g001
    DOI: 10.1371/journal.pone.0066126.g002
    DOI: 10.1371/journal.pone.0066126.g003
    DOI: 10.1371/journal.pone.0066126.g004
    DOI: 10.1371/journal.pone.0066126.t001
    DOI: 10.1371/journal.pone.0066126.t002
    DOI: 10.1371/journal.pone.0066126.t003
    DOI: 10.1371/journal.pone.0066126.t004
    DOI: 10.1371/journal.pone.0066126.t005
    DOI: 10.1371/journal.pone.0066126.t006
    Language: English
    Publisher: Public Library of Science (PLoS)
    Publication Date: 2013
    detail.hit.zdb_id: 2267670-3
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  • 19
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    Centuries of Anadromous Forage Fish Loss: Consequences for Ecosystem Connectivity and Productivity
    Oxford University Press (OUP) ; 2012
    In:  BioScience Vol. 62, No. 8 ( 2012-8), p. 723-731
    Details
    In: BioScience, Oxford University Press (OUP), Vol. 62, No. 8 ( 2012-8), p. 723-731
    Type of Medium: Online Resource
    ISSN: 1525-3244 , 0006-3568
    URL: Article
    DOI: 10.1525/bio.2012.62.8.5
    RVK:
    WA 15000
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2012
    detail.hit.zdb_id: 2066019-4
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  • 20
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    Diel Variations in Survey Catch Rates and Survey Catchability of Spiny Dogfish and their Pelagic Prey in the Northeast U.S. Continental Shelf Large Marine Ecosystem
    Wiley ; 2016
    In:  Marine and Coastal Fisheries Vol. 8, No. 1 ( 2016-01), p. 244-262
    Details
    In: Marine and Coastal Fisheries, Wiley, Vol. 8, No. 1 ( 2016-01), p. 244-262
    Abstract: This study examines the potential uncertainty in survey biomass estimates of Spiny Dogfish Squalus acanthias in the Northeast U.S. Continental Shelf Large Marine Ecosystem (NES LME). Diel catch‐per‐unit‐effort (CPUE) estimates are examined from the Northeast Fisheries Science Center bottom trawl surveys conducted during autumn (1963–2009) and spring (1968–2009). Influential environmental variables on survey catchability are identified for Spiny Dogfish life history stages and five pelagic prey species: Butterfish Peprilus triacanthus , Atlantic Herring Clupea harengus , shortfin squid Illex spp., longfin squid Doryteuthis spp., and Atlantic Mackerel Scomber scombrus . Daytime survey catchability was significantly higher than nighttime catchability for most species during autumn and for mature male Spiny Dogfish, shortfin squid, and longfin squid during spring in the NES LME. For most stages and species examined, breakpoint analyses identified significant increases in CPUE in the morning, peak CPUE during the day, and significant declines in CPUE in the late afternoon. Seasonal probabilities of daytime catch were largely driven by solar zenith angle for most species, with stronger trends identified during autumn. Unadjusted CPUE estimates appear to overestimate absolute abundance, with adjustments resulting in reductions in absolute abundance ranging from 41% for Spiny Dogfish to 91% for shortfin and longfin squids. These findings have important implications for Spiny Dogfish regarding estimates of population consumption of key pelagic prey species and their ecological footprint within the NES LME. Received February 25, 2015; accepted December 16, 2015
    Type of Medium: Online Resource
    ISSN: 1942-5120 , 1942-5120
    URL: Article
    DOI: 10.1080/19425120.2015.1135219
    Language: English
    Publisher: Wiley
    Publication Date: 2016
    detail.hit.zdb_id: 2483227-3
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